The Belgian royal family's private depot now stands abandoned and forgotten alongside the tracks.

Climb inside an iron crystal magnified 165 billion times its normal size.

Theme park featuring miniature replicas of European monuments.

A monument to the thousands of Canadian soldiers who died capturing the French ridge during World War I.

A subterranean shelter remains intact under a busy Paris railway station.

A French artist's vague warning hangs over Belleville.

Dr. Strangelove-esque tours reveal the inside a bunker once reserved for Stalin himself.

The oldest museum in Russia is home to a fascinating collection of nearly two million anthropological artifacts and anatomical curiosities.

A unique collection of Soviet military artifacts lies hidden away in a disused train, in the unrecognized Eastern European republic of Transnistria.

Thanks to its heroic service during WWII this Soviet castle has been turned into a monument towered over by a brutalist titan.

A symbolic graveyard for the villages that perished during the Nazi invasion of Belarus.

Open-air museum with a large collection of Soviet-era statues.

This rare collection of human deformities displays fetuses with two faces, one eye, and "mermaid" legs.

The widest waterfall in Europe is a natural wonder and one of the only places where fish are caught in the air.

This abandoned secret city is a crumbling wonderland of Soviet ruins.

The mile-long pier stretches from a ruined fortress out into the Baltic.

These crumbling Latvian forts make for some haunting seaside ruins.

Guests become prisoners on a visit to Latvian prison.

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

A memorial to the murdered Jews of Kaunas.

A haunting deserted hotel is a favorite with artists and photographers.

A museum of alchemy and a basement laboratory all housed in an ancient building in a Gothic tower.

One of the oldest, well-preserved water treatment facilities in all of Europe.

Two stunning 17th-century libraries and a cabinet of curiosities.